Posted by **Sara** on Friday, June 28, 2013 at 4:39pm.

Dinitrogen pentoxide, N2O5, decomposes by first-order kinetics with a rate constant of 0.15 s-1 at 353 K.

(a) What is the half-life (in seconds) for the decomposition of N2O5 at 353 K?

(b) If [N2O5]0 = 0.0579 mol·L-1, what will be the concentration of N2O5 after 4.0 s?

(c) How much time (in minutes) will elapse before the N2O5 concentration decreases from 0.0579 mol·L-1 to 0.0143 mol·L-1?

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